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#!/usr/bin/env python
#
# Public Domain 2014-present MongoDB, Inc.
# Public Domain 2008-2014 WiredTiger, Inc.
#
# This is free and unencumbered software released into the public domain.
#
# Anyone is free to copy, modify, publish, use, compile, sell, or
# distribute this software, either in source code form or as a compiled
# binary, for any purpose, commercial or non-commercial, and by any
# means.
#
# In jurisdictions that recognize copyright laws, the author or authors
# of this software dedicate any and all copyright interest in the
# software to the public domain. We make this dedication for the benefit
# of the public at large and to the detriment of our heirs and
# successors. We intend this dedication to be an overt act of
# relinquishment in perpetuity of all present and future rights to this
# software under copyright law.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#
# test_timestamp06.py
# Timestamps: multistep transactions
#
from helper import copy_wiredtiger_home
import random
from suite_subprocess import suite_subprocess
import wiredtiger, wttest
from wtscenario import make_scenarios
class test_timestamp06(wttest.WiredTigerTestCase, suite_subprocess):
table_ts_log = 'table:ts06_ts_logged'
table_ts_nolog = 'table:ts06_ts_nologged'
types = [
('col_fix', dict(empty=1, extra_config=',key_format=r,value_format=8t')),
('col_var', dict(empty=0, extra_config=',key_format=r')),
('lsm', dict(empty=0, extra_config=',type=lsm')),
('row', dict(empty=0, extra_config='',)),
]
ckpt = [
('ckpt_ts_def', dict(ckptcfg='', ckpt_ts=True)),
('ckpt_ts_false', dict(ckptcfg='use_timestamp=false', ckpt_ts=False)),
('ckpt_ts_true', dict(ckptcfg='use_timestamp=true', ckpt_ts=True)),
]
conncfg = [
('nolog', dict(conn_config='create', using_log=False)),
('V1', dict(conn_config='create,log=(enabled,remove=false),compatibility=(release="2.9")', using_log=True)),
('V2', dict(conn_config='create,log=(enabled,remove=false)', using_log=True)),
]
scenarios = make_scenarios(conncfg, types, ckpt)
# Check that a cursor (optionally started in a new transaction), sees the
# expected values.
def check(self, session, txn_config, tablename, expected):
if txn_config:
session.begin_transaction(txn_config)
cur = session.open_cursor(tablename, None)
actual = dict((k, v) for k, v in cur if v != 0)
if actual != expected:
print("missing: ", sorted(set(expected.items()) - set(actual.items())))
print("extras: ", sorted(set(actual.items()) - set(expected.items())))
self.assertTrue(actual == expected)
# Search for the expected items as well as iterating
for k, v in expected.items():
self.assertEqual(cur[k], v, "for key " + str(k))
cur.close()
if txn_config:
session.commit_transaction()
# Take a backup of the database and verify that the value we want to
# check exists in the tables the expected number of times.
def backup_check(self, check_value, expected_ts_log, expected_ts_nolog):
newdir = "BACKUP"
copy_wiredtiger_home(self, '.', newdir, True)
conn = self.setUpConnectionOpen(newdir)
session = self.setUpSessionOpen(conn)
cur_ts_log = session.open_cursor(self.table_ts_log)
cur_ts_nolog = session.open_cursor(self.table_ts_nolog)
# Count how many times the given value is present in the
# logged timestamp table.
actual_ts_log = 0
for k, v in cur_ts_log:
if check_value == v:
actual_ts_log += 1
cur_ts_log.close()
# Count how many times the given value is present in the
# not logged timestamp table
actual_ts_nolog = 0
for k, v in cur_ts_nolog:
if check_value == v:
actual_ts_nolog += 1
cur_ts_nolog.close()
conn.close()
self.assertEqual(actual_ts_log, expected_ts_log)
self.assertEqual(actual_ts_nolog, expected_ts_nolog)
# Check that a cursor sees the expected values after a checkpoint.
def ckpt_backup(self, check_value, valcnt_ts_log, valcnt_ts_nolog):
# Take a checkpoint. Make a copy of the database. Open the
# copy and verify whether or not the expected data is in there.
self.pr("CKPT: " + self.ckptcfg)
ckptcfg = self.ckptcfg
self.session.checkpoint(ckptcfg)
self.backup_check(check_value, valcnt_ts_log, valcnt_ts_nolog)
def test_timestamp06(self):
# Open two timestamp tables:
# 1. Table is logged and uses timestamps.
# 2. Table is not logged and uses timestamps.
self.session.create(self.table_ts_log, 'key_format=i,value_format=i' + self.extra_config)
cur_ts_log = self.session.open_cursor(self.table_ts_log)
self.session.create(self.table_ts_nolog, 'key_format=i,value_format=i,log=(enabled=false)' + self.extra_config)
cur_ts_nolog = self.session.open_cursor(self.table_ts_nolog)
# Insert keys 1..100
nkeys = 100
orig_keys = list(range(1, nkeys+1))
keys = orig_keys[:]
random.shuffle(keys)
self.session.begin_transaction()
# Make three updates with different timestamps.
self.session.timestamp_transaction('commit_timestamp=' + self.timestamp_str(1))
for k in keys:
cur_ts_log[k] = 1
cur_ts_nolog[k] = 1
self.session.timestamp_transaction('commit_timestamp=' + self.timestamp_str(101))
for k in keys:
cur_ts_log[k] = 2
cur_ts_nolog[k] = 2
self.session.timestamp_transaction('commit_timestamp=' + self.timestamp_str(201))
for k in keys:
cur_ts_log[k] = 3
cur_ts_nolog[k] = 3
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(301))
cur_ts_log.close()
cur_ts_nolog.close()
# Scenario: 1
# Check that we see all the latest values (i.e. 3) as per transaction
# visibility when reading without the read timestamp.
# All tables should see all the values.
self.check(self.session, "", self.table_ts_log,
dict((k, 3) for k in orig_keys))
self.check(self.session, "", self.table_ts_nolog,
dict((k, 3) for k in orig_keys))
# Scenario: 2
# Check that we see the values till correctly from checkpointed data
# files in case of multistep transactions.
# Set oldest and stable timestamps
old_ts = self.timestamp_str(100)
# Set the stable timestamp such that last update is beyond it.
stable_ts = self.timestamp_str(200)
self.conn.set_timestamp('oldest_timestamp=' + old_ts)
self.conn.set_timestamp('stable_timestamp=' + stable_ts)
# Check that we see the values correctly till stable timestamp.
self.check(self.session, 'read_timestamp=' + stable_ts,
self.table_ts_log, dict((k, 2) for k in orig_keys))
self.check(self.session, 'read_timestamp=' + stable_ts,
self.table_ts_nolog, dict((k, 2) for k in orig_keys))
# For logged table we should see latest values (i.e. 3) when logging
# is enabled.
if self.using_log == True:
valcnt_ts_log = nkeys
else:
# When logging is disabled, we should not see the values beyond the
# stable timestamp with timestamped checkpoints.
if self.ckpt_ts == True:
valcnt_ts_log = 0
else:
valcnt_ts_log = nkeys
# For non-logged table we should not see the values beyond the
# stable timestamp with timestamped checkpoints.
if self.ckpt_ts == True:
valcnt_ts_nolog = 0
else:
valcnt_ts_nolog = nkeys
# Check to see the count of latest values as expected from checkpoint.
self.ckpt_backup(3, valcnt_ts_log, valcnt_ts_nolog)
self.ckpt_backup(2, (nkeys - valcnt_ts_log), (nkeys - valcnt_ts_nolog))
# Scenario: 3
# Check we see all the data values correctly after rollback. Skip the case where the most
# recent checkpoint wasn't based on the last stable timestamp, those can't be rolled back.
if self.ckpt_ts == False:
return
self.conn.rollback_to_stable()
# All tables should see the values correctly when read with
# read timestamp as stable timestamp.
self.check(self.session, 'read_timestamp=' + stable_ts,
self.table_ts_nolog, dict((k, 2) for k in orig_keys))
self.check(self.session, 'read_timestamp=' + stable_ts,
self.table_ts_log, dict((k, 2) for k in orig_keys))
# Scenario: 4
# Check that we see the values correctly when read without any
# timestamp.
if self.using_log == True:
# For logged table we should see latest values (i.e. 3) when logging
# is enabled.
self.check(self.session, "",
self.table_ts_log, dict((k, 3) for k in orig_keys))
else:
# When logging is disabled, we should not see the values beyond the
# stable timestamp with timestamped checkpoints.
self.check(self.session, "",
self.table_ts_log, dict((k, 2) for k in orig_keys))
# For non-logged table we should not see the values beyond the
# stable timestamp with timestamped checkpoints.
self.check(self.session, "",
self.table_ts_nolog, dict((k, 2) for k in orig_keys))
if __name__ == '__main__':
wttest.run()
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